Microsoft now provides free accounts to OneDrive for Business for Education.
Tutorials about collaboration in OneDrive for Business (and education) from the Microsoft Virtual Academy
Login to OneDrive and select the rubric box to see the resources available.
OneDrive For Business:
Specifically for Education, Microsoft has a secure, compliant service called OneDrive for Business, where teachers and students get Unlimited Storage.
Schools need to sign up for Free Office 365 for Education for their unlimited Storage.
Sync files to the desktop:
Teachers and students can sync files onto the desktop, share files and collaborate seamlessly. Files can also be easily accessed from mobile devices on iOS and Android Platforms as well.
Access files from mobile devices:
Access to OneDrive documents is available from the desktop, tablet, and/or smartphone.
Filetypes and Native format:
You can save files types of any type including PDF, MP3 etc. not just office documents. OneDrive for business facilitates the preserving of Office documents in their native file formats. Office documents will not lose their file formatting which is common when using other 3rd party storage services.
Features for the classroom:
Share files and folders
Organize photos and files
Play most .mp4, QuickTime .mov, Apple video .mp4 files directly within OneDrive in most web browsers
Search and find files saved in OneDrive
Use mobile device apps to access OneDrive files (Android, iOS, Windows Phone, Xbox 360
With the school OneDrive account, the other Microsoft programs are available online free (Word, PowerPoint, OneNote, Excel